Pump shell :
The role of the impeller is enclosed in a certain space for the role by the impeller suction and pressure of liquid. Pump casing made of more than a spiral case, it is also known as the spiral case. As the flow channel cross-sectional area is gradually expanded, the high speed liquid thrown from the impeller is gradually reduced and the kinetic energy is converted into static pressure energy efficiently. Pump shell not only brings together the liquid thrown by the impeller, but also an energy conversion device.
Shaft sealing instrument :
Role is to prevent the pump shell leakage of liquid along the axis or outside air leakage into the pump shell.
Common seal device has two kinds of packing seal and mechanical seal.
Filler generally Baptist oil or graphite coated with asbestos rope. Mechanical seal is mainly by the moving ring installed on the shaft and fixed on the pump casing between the static ring for the relative movement of the end face and achieve the purpose of sealing.
